APT
dpkg name format
[name]_[version]-[revision]_[architecture].deb
List 32-bit packages
dpkg --list | grep i386
What version is currently installed for [package]?
dpkg --status [package]
[file] is installed by which [package]?
dpkg --search [file]
What files are installed with [package]?
dpkg --listfiles [package]
Upgrade packages
apt-get upgrade never installs new packages and never remove existing packages.
apt upgrade never removes existing packages but might install new packages. It also upgrades kernel packages and kernal image if any.
apt full-upgrade upgrades packages and kernel packages. It might install new packages or remove existing ones if it is necessary for the ugrade.
Key management
apt-key add [pgp-key]
apt-key del [id]
Connections
List WiFi networks within range
nmcli device wifi list
List managed network connections
nmcli connection show
Connect to WiFi network
nmcli device wifi connect [ssid] password [password]
Displays
xrandr